Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57961ac89c999ce…

MALICIOUS

PDF

77.5 KB Created: 2021-01-26 05:09:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4f4eee51134e64c7d758cc402de1c817 SHA-1: 9c483baabd0534966f3c91f30818e6cbaf563f44 SHA-256: a57961ac89c999ce2d76003d23cbf500da3e1136b4ebab40f11d2e1dde005f56
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains keywords related to product pricing, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/123?utm_term=iphone+5+price+in+india+32gb PDF link annotation
    • http://rent-nout.site/4x4_offroad_parking_simulatortplry.pdfIn PDF document text
    • http://petersikdar.com/warrior_soul_lyrics7pnk8.pdfIn PDF document text
    • http://216tilford.com/table_top_arch_kito0l5d.pdfIn PDF document text
    • http://wokulorumal.iblogger.org/ff13-_2_strategy_guide.pdfIn PDF document text
    • http://rewita.fun/62503092780yh225.pdfIn PDF document text
    • https://cdn.sqhk.co/sorubajuzoxe/VKSRmgc/bamboo_paper_towels_and_toilet_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/gcibhbv/guide_for_homescapes_2018_page_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mokixetat/form_to_apply_for_british_passport.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/brain_teasers_funny_riddles_with_answers.pdfIn PDF document text
    • http://zutulig.epizy.com/stream_ed_movies_to_apple_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/guidewire_connections_2019_conference.pdfIn PDF document text
    • http://nomapalugaji.epizy.com/dixagomud.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/nonconformity_definition_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/79628820410.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/88483703240.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/coliform_bacteria_test_method.pdfIn PDF document text
    • http://fojoxolizono.rf.gd/siruvarowufomofifij.pdfIn PDF document text
    • http://togipumenotu.epizy.com/pekavataregufakotawufan.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/facebook_video_hd_apk.pdfIn PDF document text
    • http://gekavitominugi.epizy.com/tixuwiwoxubisifedewonumu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA00 5620 bytes
SHA-256: f5a4a515ba5ec688aa21bbdc9c76c0c71a59c930a62145784a0f9e6de8d51f62
font_01_sfnt_off0000ed13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 10756 bytes
SHA-256: dd7db187096895b7b69266a0a03fd092bb5b45de0dff0c6829126e6d34568df0
font_02_sfnt_off000111eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EB 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140

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